PVC Chinese name: Polyvinyl chloride.
PVC is identified by combustion method, softening or melting temperature range: 75~90°C; combustion condition: difficult to soften; burning flame state: yellow smoke under green; after fire: extinguished from fire; smell: irritating sour.
It can also be identified by solvent treatment: solvent: tetrahydrofuran, cyclohexanone, ketone, dimethylformamide; non-solvent: methanol, acetone, heptane.
PVC can be regenerated and granulated. The main way is to recycle the process master, including the following six steps:
(1) Pretreatment of PVC waste;
(2) selective dissolution in a mixed solvent;
(3) separating insoluble materials;
(4) precipitation of recycled PVC;
(5) drying treatment;
(6) Recycling and recycling of solvents.
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